IBM 8649 Hardware Maintenance Manual - Page 29

Diagnostics

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Chapter 3. Diagnostics This section provides basic troubleshooting information to help you resolve some common problems that might occur with your server. If you cannot locate and correct the problem using the information in this section, see Appendix A, "Getting help and technical assistance," on page 127 for more information. General checkout The server diagnostic programs are stored on the IBM Enhanced Diagnostics CD. These programs provide the primary methods of testing the major components of the server. If you cannot determine whether a problem is caused by the hardware or by the software, you can run the diagnostic programs to confirm that the hardware is working properly. When you run the diagnostic programs, a single problem might cause several error messages. When this occurs, work to correct the cause of the first error message. After the cause of the first error message is corrected, the other error messages might not occur the next time you run the test. A failed server might be part of a shared hard disk drive cluster (two or more servers sharing one or more external storage devices). Before you run diagnostics, verify that the failing server is not part of a shared hard disk drive cluster. A server might be part of a cluster if: v The server is identified as part of a cluster. v One or more external storage units are attached to the server and at least one of the attached storage units is also attached to another server or unidentifiable source. v One or more servers are located near the failing server. If the failing server is suspected to be part of a shared hard disk drive cluster, you can run all diagnostic tests except the diagnostic tests that test the storage unit (hard disk drive residing in the storage unit) or the storage adapter attached to the storage unit. Notes: 1. For servers that are part of a shared hard disk drive cluster, run one test at a time. Do not run any suite of testes, such as ″quick″ or ″normal″ tests, because this could enable the hard disk drive diagnostic tests. 2. If multiple error codes are displayed, diagnose the first error code that is displayed. 3. If the server stops with a POST error, go to "POST error codes" on page 110. 4. If the server stops and no error is displayed, go to "Undetermined problems" on page 118. 5. For power supply problems, see "Power checkout" on page 29 6. For safety information, see "Safety information" on page 129. 7. For intermittent problems, check the error log. © Copyright IBM Corp. 2004 19

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Chapter
3.
Diagnostics
This
section
provides
basic
troubleshooting
information
to
help
you
resolve
some
common
problems
that
might
occur
with
your
server.
If
you
cannot
locate
and
correct
the
problem
using
the
information
in
this
section,
see
Appendix
A,
“Getting
help
and
technical
assistance,”
on
page
127
for
more
information.
General
checkout
The
server
diagnostic
programs
are
stored
on
the
IBM
Enhanced
Diagnostics
CD
.
These
programs
provide
the
primary
methods
of
testing
the
major
components
of
the
server.
If
you
cannot
determine
whether
a
problem
is
caused
by
the
hardware
or
by
the
software,
you
can
run
the
diagnostic
programs
to
confirm
that
the
hardware
is
working
properly.
When
you
run
the
diagnostic
programs,
a
single
problem
might
cause
several
error
messages.
When
this
occurs,
work
to
correct
the
cause
of
the
first
error
message.
After
the
cause
of
the
first
error
message
is
corrected,
the
other
error
messages
might
not
occur
the
next
time
you
run
the
test.
A
failed
server
might
be
part
of
a
shared
hard
disk
drive
cluster
(two
or
more
servers
sharing
one
or
more
external
storage
devices).
Before
you
run
diagnostics,
verify
that
the
failing
server
is
not
part
of
a
shared
hard
disk
drive
cluster.
A
server
might
be
part
of
a
cluster
if:
v
The
server
is
identified
as
part
of
a
cluster.
v
One
or
more
external
storage
units
are
attached
to
the
server
and
at
least
one
of
the
attached
storage
units
is
also
attached
to
another
server
or
unidentifiable
source.
v
One
or
more
servers
are
located
near
the
failing
server.
If
the
failing
server
is
suspected
to
be
part
of
a
shared
hard
disk
drive
cluster,
you
can
run
all
diagnostic
tests
except
the
diagnostic
tests
that
test
the
storage
unit
(hard
disk
drive
residing
in
the
storage
unit)
or
the
storage
adapter
attached
to
the
storage
unit.
Notes:
1.
For
servers
that
are
part
of
a
shared
hard
disk
drive
cluster,
run
one
test
at
a
time.
Do
not
run
any
suite
of
testes,
such
as
″
quick
″
or
″
normal
″
tests,
because
this
could
enable
the
hard
disk
drive
diagnostic
tests.
2.
If
multiple
error
codes
are
displayed,
diagnose
the
first
error
code
that
is
displayed.
3.
If
the
server
stops
with
a
POST
error,
go
to
“POST
error
codes”
on
page
110.
4.
If
the
server
stops
and
no
error
is
displayed,
go
to
“Undetermined
problems”
on
page
118.
5.
For
power
supply
problems,
see
“Power
checkout”
on
page
29
6.
For
safety
information,
see
“Safety
information”
on
page
129.
7.
For
intermittent
problems,
check
the
error
log.
©
Copyright
IBM
Corp.
2004
19